Home / 2,638.58-3,954.22-1,988.55

Finding the Fourth Proportional to 2,638.58, 3,954.22 and 1,988.55

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Solution

The fourth proportional to 2,638.58, 3,954.22 and 1,988.55 is: 2,980.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.58 : 3,954.22 = 1,988.55 : x
  2. Step 2: Convert to fraction form
    2,638.58/3,954.22 = 1,988.55/x
  3. Step 3: Cross multiply
    2,638.58x = 3,954.22 × 1,988.55
  4. Step 4: Simplify right side
    2,638.58x = 7,863,159.21
  5. Step 5: Solve for x
    x = 7,863,159.21/2,638.58
  6. Step 6: Final answer
    x = 2,980.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.